What's the halachic problems if any to rollerblade on shabbas? Do we compare it to biking (Kaf Hachaim assurs it)? Are there any contemporary tshuvos which discuss this? I have heard two problems if they break one might come to fix the wheel, and that it is not bederch kavod shabbas.
I found the Rivevos Ephraim 3:206 who addresses this issue. He says that in a Reshus harabim it is forbidden. He also mentions we don't ride bikes and this is similar. He references Shmiras shabbas khilchita 15:13.
He ends off saying that his wife claims that it should be forbidden because of digging up dirt and uprooting grass. He says that even if there is no grass or dirt it is forbidden.
Hacham Bension Musafi Shalti"a says that without an Eruv it is forsure Asur, but with an Eruv it is okay for kids until age 9. (He adds to make sure there are no lights). But it seems like he would Matir for an adult Bimkom Miswa (see answers 37054 and 13421 on doresh-tzion.co.il)